Annotation of libaitsess/inc/aitsess.h, revision 1.3.2.7
1.2 misho 1: /*************************************************************************
2: * (C) 2008 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.3.2.7 ! misho 6: * $Id: aitsess.h,v 1.3.2.6 2012/02/10 22:46:41 misho Exp $
1.2 misho 7: *
1.3 misho 8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
1.1 misho 46: #ifndef __AITSESS_H
47: #define __AITSESS_H
48:
49:
1.3 misho 50: #include <assert.h>
1.1 misho 51: #include <semaphore.h>
52: #include <sys/types.h>
1.3.2.1 misho 53: #include <aitio.h>
1.1 misho 54:
1.3.2.3 misho 55: #define SHARED_UNKNOWN -1
56: #define SHARED_IPC 0
57: #define SHARED_MAP 1
1.1 misho 58:
59: #define IS_VAL 0x0
60: #define IS_ADD 0x40000000
61: #define IS_DEF 0x80000000
62:
63: #define ISNEW(x) (((x) & IS_ADD) == IS_ADD)
64: #define ISDEF(x) (((x) & IS_DEF) == IS_DEF)
65:
1.3.2.2 misho 66: #define MAX_ATTRIBUTE 64
1.1 misho 67: #define MAX_SEMNAME 14
68:
69:
1.3.2.7 ! misho 70: typedef struct tagSess {
1.1 misho 71: key_t key;
1.3.2.3 misho 72: char type;
73: char zcpy;
1.3.2.5 misho 74:
75: char name[BUFSIZ];
1.1 misho 76: off_t eom;
77: void *addr;
78: off_t offset;
79: union {
80: int shmid;
81: int fd;
82: } mem;
83: union {
84: int semid;
85: sem_t *sid;
86: } id;
1.3.2.3 misho 87:
88: struct {
1.3.2.7 ! misho 89: int (*create)(int, long, void *, ...);
! 90: void (*destroy)(void *);
! 91: void *(*attach)(void *, void *);
! 92: void (*detach)(void *);
! 93: void (*notSem)(void *);
! 94: int (*isSemOK)(void *);
! 95: int (*incSem)(void *);
! 96: int (*decSem)(void *);
1.3.2.3 misho 97: } sess;
1.3.2.7 ! misho 98: } ait_sess_t;
1.1 misho 99:
100:
101: // -------------------------------------------------------
102: // sess_GetErrno() Get error code of last operation
103: inline int sess_GetErrno();
104: // sess_GetError() Get error text of last operation
105: inline const char *sess_GetError();
1.3.2.1 misho 106: // sess_SetErr() Set error to variables for internal use!!!
107: inline void sess_SetErr(int eno, char *estr, ...);
1.1 misho 108: // -------------------------------------------------------
109:
110:
111: /*
1.3.2.3 misho 112: * sess_initSession() Initializing session structure, if session file not exists creating with specified tech
113: *
114: * @id = Technology using in session. SHARED_IPC IPC tech orSHARED_MAP BSD MemoryMap tech
1.1 misho 115: * @csFName = Session filename for build key and identified
1.3 misho 116: * @Sess = Session item, if =NULL allocate memory for session after use must be free!
1.1 misho 117: * return: 0 OK new key created, -1 error: no memory or file not created, 1 OK key finded
1.3.2.3 misho 118: */
119: int sess_initSession(int id, const char *csFName, ait_sess_t ** __restrict Sess);
1.1 misho 120: /*
1.3.2.3 misho 121: * sess_freeSession() Free allocated memory for session item and delete session file if present name
122: *
1.1 misho 123: * @Sess = Session item
1.3.2.6 misho 124: * @delFile = !=0 delete session file or =0 keep session
1.3.2.3 misho 125: * return: none
126: */
1.3.2.6 misho 127: void sess_freeSession(ait_sess_t ** __restrict Sess, int delFile);
1.3.2.3 misho 128:
1.1 misho 129:
130: /*
131: * map_createSession() MMAP Created session and allocated resources
1.3.2.3 misho 132: *
133: * @nSeed = Seed for securing key, if =-1 must add ready for use key
134: * @nSize = Allocated shared memory size in bytes
1.1 misho 135: * @Sess = Session item
1.3.2.3 misho 136: * @... = If nSeed == -1 add ready for use key value
1.1 misho 137: * return: 0 Ok successful, -1 error: not allocated resources
1.3.2.3 misho 138: */
1.3.2.5 misho 139: int map_createSession(int nSeed, long nSize, ait_sess_t * __restrict Sess, ...);
1.1 misho 140: /*
141: * map_destroySession() MMAP free shared resources
1.3.2.3 misho 142: *
1.1 misho 143: * @Sess = Session item
1.3.2.3 misho 144: * return: none
145: */
1.3.2.5 misho 146: void map_destroySession(ait_sess_t * __restrict Sess);
1.1 misho 147:
148: /*
149: * ipc_createSession() IPC Created session and allocated resources
1.3.2.3 misho 150: *
151: * @nSeed = Seed for securing key, if =-1 must add ready for use key
152: * @nSize = Allocated shared memory size in bytes
1.1 misho 153: * @Sess = Session item
1.3.2.3 misho 154: * @... = If nSeed == -1 add ready for use key value
1.1 misho 155: * return: 0 Ok successful, -1 error: not allocated resources
1.3.2.3 misho 156: */
1.3.2.5 misho 157: int ipc_createSession(int nSeed, long nSize, ait_sess_t * __restrict Sess, ...);
1.1 misho 158: /*
159: * ipc_destroySession() IPC free shared resources
1.3.2.3 misho 160: *
1.1 misho 161: * @Sess = Session item
1.3.2.3 misho 162: * return: none
163: */
1.3.2.5 misho 164: void ipc_destroySession(ait_sess_t * __restrict Sess);
1.1 misho 165:
166: /*
167: * map_attachSession() MMAP Attach to shared memory & return begin address
1.3.2.3 misho 168: *
1.1 misho 169: * @s = Session item
170: * @procMem = Custom start address (optionl) *default must be 0*
171: * return: NULL failed attach, !=NULL begin address of memory
1.3.2.3 misho 172: */
173: void *map_attachSession(ait_sess_t * __restrict s, void *procMem);
1.1 misho 174: /*
175: * map_detachSession() MMAP Detach from shared memory
1.3.2.3 misho 176: *
1.1 misho 177: * @s = Session item
1.3.2.3 misho 178: * return: none
179: */
180: void map_detachSession(ait_sess_t * __restrict s);
1.1 misho 181:
182: /*
183: * ipc_attachSession() IPC Attach to shared memory & return begin address
1.3.2.3 misho 184: *
1.1 misho 185: * @s = Session item
186: * @procMem = Custom start address (optionl) *default must be 0*
187: * return: NULL failed attach, !=NULL begin address of memory
1.3.2.3 misho 188: */
189: void *ipc_attachSession(ait_sess_t * __restrict s, void *procMem);
1.1 misho 190: /*
191: * ipc_detachSession() IPC Detach from shared memory
1.3.2.3 misho 192: *
1.1 misho 193: * @s = Session item
1.3.2.3 misho 194: * return: none
195: */
196: void ipc_detachSession(ait_sess_t * __restrict s);
1.1 misho 197:
198: /*
1.3.2.3 misho 199: * sess_isAttached() Check for attached shared memory
200: *
1.2 misho 201: * @s = Session item
202: * return: -1 null session item, 0 not attached, 1 attached memory
1.3.2.3 misho 203: */
204: inline int sess_isAttached(ait_sess_t * __restrict s);
1.2 misho 205:
206:
207: /*
1.1 misho 208: * map_notSemaphore() MMAP negative block if semaphore isn`t signaled
1.3.2.3 misho 209: *
1.1 misho 210: * @s = Session item
1.3.2.3 misho 211: * return: none
212: */
213: void map_notSemaphore(ait_sess_t * __restrict s);
1.1 misho 214: /*
1.3.2.3 misho 215: * map_isSemaphoreOK() MMAP Check semaphore
216: *
1.1 misho 217: * @s = Session item
218: * return: -1 error: can`t return semaphore, 0 = false, 1 = true
1.3.2.3 misho 219: */
220: int map_isSemaphoreOK(ait_sess_t * __restrict s);
1.1 misho 221: /*
1.3.2.3 misho 222: * map_incSemaphore() MMAP unblock semaphore, increment semaphore
223: *
1.1 misho 224: * @s = Session item
225: * return: 0 Ok, -1 error: can`t increment
1.3.2.3 misho 226: */
227: int map_incSemaphore(ait_sess_t * __restrict s);
1.1 misho 228: /*
229: * map_decSemaphore() MMAP block semaphore, decrement semaphore
1.3.2.3 misho 230: *
1.1 misho 231: * @s = Session item
232: * return: 0 Ok, -1 error: can`t decrement
1.3.2.3 misho 233: */
234: int map_decSemaphore(ait_sess_t * __restrict s);
1.1 misho 235:
236: /*
237: * ipc_notSemaphore() IPC negative block if semaphore isn`t signaled
1.3.2.3 misho 238: *
1.1 misho 239: * @s = Session item
1.3.2.3 misho 240: * return: none
241: */
242: void ipc_notSemaphore(ait_sess_t * __restrict s);
1.1 misho 243: /*
1.3.2.3 misho 244: * ipc_isSemaphoreOK() IPC Check semaphore
245: *
1.1 misho 246: * @s = Session item
247: * return: -1 error: can`t return semaphore, 0 = false, 1 = true
1.3.2.3 misho 248: */
249: int ipc_isSemaphoreOK(ait_sess_t * __restrict s);
1.1 misho 250: /*
1.3.2.3 misho 251: * ipc_incSemaphore() IPC unblock semaphore, increment semaphore
252: *
1.1 misho 253: * @s = Session item
254: * return: 0 Ok, -1 error: can`t increment
1.3.2.3 misho 255: */
256: int ipc_incSemaphore(ait_sess_t * __restrict s);
1.1 misho 257: /*
258: * ipc_decSemaphore() IPC block semaphore, decrement semaphore
1.3.2.3 misho 259: *
1.1 misho 260: * @s = Session item
261: * return: 0 Ok, -1 error: can`t decrement
1.3.2.3 misho 262: */
263: int ipc_decSemaphore(ait_sess_t * __restrict s);
264:
265:
266: /* --------------------------------------------------------- */
1.1 misho 267:
1.3.2.5 misho 268: #define ALLOC_MEMORY(sd, siz, s, ...) (assert((s)), (s)->sess.create((sd), \
269: (siz), (s), ## __VA_ARGS__))
270: #define ATTACH_MEMORY(s) (assert((s)), (s)->sess.attach((s), NULL))
271: #define DETACH_MEMORY(s) do { assert((s)); (s)->sess.detach((s)); } while(0)
272: #define FREE_MEMORY(s) do { assert((s)); (s)->sess.destroy((s)); } while(0)
273:
274: #define IS_SEMOK(s) (assert((s)), (s)->sess.isSemOK((s)))
275: #define INC_SEM(s) (assert((s)), (s)->sess.incSem((s)))
276: #define DEC_SEM(s) (assert((s)), (s)->sess.decSem((s)))
277: #define NOT_SEM(s) do { assert((s)); (s)->sess.notSem((s)); } while(0)
1.3.2.3 misho 278:
279: /* --------------------------------------------------------- */
1.1 misho 280:
281: /*
1.2 misho 282: * sess_FreeValues() Free all values from value array allocated from sess_GetValues()
1.3.2.3 misho 283: *
1.2 misho 284: * @ppsVals = Array strings
285: * return: none
1.3.2.3 misho 286: */
1.2 misho 287: inline void sess_FreeValues(char *** __restrict ppsVals);
288: /*
289: * sess_GetValues() Get all values from session shared memory
1.3.2.3 misho 290: *
1.2 misho 291: * @s = Session item
292: * @ppsVals = Return array strings
293: * return: -1 error: in parameter, !=-1 count of returned strings in ppsVals (must be free after use!)
1.3.2.3 misho 294: */
295: int sess_GetValues(ait_sess_t * __restrict s, char ***ppsVals);
1.2 misho 296: /*
1.1 misho 297: * sess_GetValue() Get value from session shared memory from attribute
1.3.2.3 misho 298: *
1.1 misho 299: * @s = Session item
300: * @csAttr = Attribute for search
301: * @psVal = Return string buffer
302: * @pnLen = Length of return string buffer,
303: // *{pnLen} input is max_size of buffer & output is really taken bytes
304: * return: 0 not found, -1 error: in parameter, >0 get position, if define item merged with IS_DEF
1.3.2.3 misho 305: */
306: int sess_GetValue(ait_sess_t * __restrict s, const char *csAttr, char *psVal, int *pnLen);
1.1 misho 307: /*
308: * sess_DelValue() Delete item from session shared memory
1.3.2.3 misho 309: *
1.1 misho 310: * @s = Session item
311: * @csAttr = Attribute for erasing
312: * return: 0 Ok, -1 error: in parameter
1.3.2.3 misho 313: */
314: int sess_DelValue(ait_sess_t * __restrict s, const char *csAttr);
1.1 misho 315: /*
316: * sess_SetValue() Set item into session shared memory or update if find it
1.3.2.3 misho 317: *
1.1 misho 318: * @s = Session item
319: * @csAttr = Attribute
320: * @psVal = Value
321: * return: 0 nothing, -1 error: in parameter,
322: >0 set position, if add item merged with IS_ADD and if define item merged with IS_DEF
1.3.2.3 misho 323: */
324: int sess_SetValue(ait_sess_t * __restrict s, const char *csAttr, const char *psVal);
1.1 misho 325:
1.3.2.1 misho 326: /*
327: * sess_prepareSession() Attach to shared memory and de-marshaling data
1.3.2.3 misho 328: *
1.3.2.1 misho 329: * @s = Session
330: * @useDirect = Use direct shared memory if !=0 or snapshot of data to array
331: * return: NULL error or no data, !=NULL array with variables,
332: * after use must free resources with sess_doneSession()
333: */
1.3.2.3 misho 334: array_t *sess_prepareSession(ait_sess_t * __restrict s, char useDirect);
1.3.2.1 misho 335: /*
336: * sess_doneSession() Free resources allocated with sess_prepareSession()
1.3.2.3 misho 337: *
1.3.2.1 misho 338: * @s = Session
339: * @arr = Array with variables for free
340: * return: none
341: */
1.3.2.3 misho 342: void sess_doneSession(ait_sess_t * __restrict s, array_t ** __restrict arr);
1.3.2.1 misho 343: /*
344: * sess_commitSession() Commit data to shared memory
1.3.2.3 misho 345: *
1.3.2.1 misho 346: * @s = Session
347: * @arr = Array with variables for save
348: * return -1 error or !=-1 size of stored variables into shared memory
349: */
1.3.2.3 misho 350: int sess_commitSession(ait_sess_t * __restrict s, array_t * __restrict arr);
1.3.2.1 misho 351:
1.1 misho 352:
353: #endif
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